AV Stumpfl modification accessory consisting of a SONESSE/6/28/RTS radio motor configuration with a Situo 1 control unit. The component is intended for integration into compatible AV Stumpfl frame or screen systems. It is supplied as article BRZ-MOD/FM/6NM and is classified as a system component rather than a projection screen or projection surface. Gross and net weight are each 0.1 kg.